Hello!I was new user on using Photoshop sketch. I tried to import some of my brushes to the apps and found I accidentally bring in two same brushes set.I can't find the delete/remove button to delete the extra one Please help if there's any solution!

Brushes can't (yet) be removed inside of Sketch. They can, however, be removed from the Libraries tab in the Creative Cloud Mobile App or by logging in with your Adobe ID to https://assets.adobe.com/assets/libraries and deleting them there.

Just keep in mind... If you delete the entire library the deletion is permanent.